CN108632965B

CN108632965B - Method and equipment for controlling uplink transmitting power

Info

Publication number: CN108632965B
Application number: CN201710184920.7A
Authority: CN
Inventors: 王亚飞; 张弛; 龚政委
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-03-24
Filing date: 2017-03-24
Publication date: 2023-08-22
Anticipated expiration: 2037-03-24
Also published as: EP3565323A1; EP3565323B1; US11082975B2; CN108632965A; WO2018171761A1; EP3565323A4; US20200022142A1

Abstract

A method and apparatus for uplink transmit power control. The embodiment of the application discloses a power control method, and belongs to the technical field of wireless communication. The method comprises the following steps: the terminal equipment receives the signaling from the wireless access network equipment; the terminal equipment acquires the time slot of the power control information required by the terminal equipment for uplink transmission according to the signaling; the terminal equipment acquires the power control information required by the uplink transmission on the time slot where the power control information required by the uplink transmission is located, so that the terminal equipment does not need to dynamically acquire the uplink power control information of the terminal equipment based on the static proportion of uplink and downlink subframes in the prior art.

Description

Method and equipment for controlling uplink transmitting power

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a method and apparatus for controlling uplink transmission power.

Background

With the development of wireless communication technology, various new services are layered endlessly, and the requirements of different services for resources are different, which requires more efficient use of limited resources in future wireless networks. To achieve this, dynamic time division duplex (Dynamic Time Division Duplex, D-TDD) technology is receiving increasing attention. The dynamic time division duplex refers to that the network can flexibly adjust the configuration of uplink and downlink subframes, so that the network can dynamically adjust the configuration of the TDD uplink and downlink subframes according to the requirements of different services on uplink and downlink resources, and the purpose of optimizing resource utilization is achieved. Third generation partnership project (3) ^rd Standardization work for D-TDD has been primarily done in Release 12 stage in Generation Partnership Project,3GPP, the name of this feature in the standard being enhanced interference management and traffic adaptation (Enhanced Interference Management and Traffic Adaptation, elmta).

The standardization work for 2020 and future next generation wireless communication technologies (New Radio Access Technology, NR) has been scheduled, and each large equipment manufacturer and operator have discussed the evolution and standard scheme of D-TDD in NR, and have proposed a fully dynamic D-TDD (Fully Dynamic TDD).

In fully dynamic D-TDD, each subframe type is not predefined, and flexible parts of the subframe are one of Uplink (UL) or Downlink (DL), which have become hot spots in NR discussions.

The flexible uplink and downlink subframe configuration can adapt to more mobile interconnection application scenes, such as an application scene of real-time interaction such as online games, has high requirement on interaction time delay, the interaction time delay can be reduced through the rapid switching of the uplink and downlink subframes, the application scenes such as online Video On Demand (VOD) with high requirement on downlink data transmission rate require more downlink subframe resources to be configured by a wireless network, and the application with high requirement on uplink data transmission rate such as local resource sharing should be allocated with more uplink subframe resources, so that the allocation of the wireless transmission resources is more flexible, the diversity of the adaptive mobile application scene is realized, and the maximum utilization of the limited transmission resources is realized.

Fully Dynamic TDD is based on dynamic change of a subframe level, so that interference characteristics in different subframes are different, a network side cannot configure subframe set information semi-statically, and how to determine uplink transmission power control parameters under the condition that subframe types are flexible and variable is not solved currently.

Disclosure of Invention

In order to solve the problem of meeting the requirements of future mobile communication and improving the system performance, the application provides a method and a device for controlling the uplink transmission power, which can dynamically determine the uplink transmission power control parameter under the condition that the subframe type of the system is flexible and variable. The technical proposal is as follows:

in a first aspect, an embodiment of the present application provides a method for controlling uplink transmit power, where the method is mainly proposed from the perspective of a terminal device, and the method includes: the terminal equipment receives control signaling sent by the wireless access network equipment; the terminal equipment acquires the time slot where the power control information required by the terminal equipment for uplink transmission is located according to the control signaling, and acquires the power control information required by the terminal equipment for uplink transmission on the time slot where the power control information required by the terminal equipment for uplink transmission is located. Therefore, the terminal equipment can dynamically obtain the power control information related to the uplink power control, such as closed-loop power control parameter indication information, without static proportion based on the uplink and downlink subframes, so that the method can meet the requirements of future mobile communication and improve the system performance.

In one possible implementation manner, the control signaling includes indication information, where the indication information includes timeslot offset information, where the timeslot offset information is used to indicate an offset between a timeslot where power control information required for uplink transmission by the terminal device is located and a timeslot where power control information required for uplink transmission by the terminal device is scheduled to the terminal device for uplink physical channel transmission, and the terminal device can learn, according to the control signaling, for example, according to the timeslot offset, a timeslot where power control information required for uplink transmission by the terminal device is located.

In one possible implementation, the time slot scheduled to the terminal device for transmitting the uplink physical channel is a time slot; the terminal device uses the power control information to transmit an uplink physical channel on the one slot.

In one possible implementation, the time slots scheduled to the terminal device for transmitting the uplink physical channel are a plurality of consecutive uplink time slots, and the terminal device transmits the uplink physical channel by applying the power control information to each of the plurality of consecutive uplink time slots. In this way, for the scenario of uplink time slot aggregation, each uplink time slot can transmit the uplink physical channel by using the power control information, so that the terminal device can dynamically obtain the power control information related to uplink power control, such as closed-loop parameter indication information, without based on static proportion of uplink and downlink subframes.

In one possible implementation manner, the determining, by the terminal device, the transmission power of the uplink physical channel by using the power control information on each uplink timeslot in the plurality of consecutive uplink timeslots includes: when the calculation mode of the power control parameter is the accumulation mode, the transmission power of other time slots after the first time slot is the same as the transmission power of the first time slot in the plurality of continuous uplink time slots; or under the condition that the calculation mode of the power control parameter is an absolute value mode, in the plurality of continuous uplink time slots, the sequence number of the first time slot is i, the corresponding time slot offset is k, the sequence number of the subsequent time slot is i+n, the sequentially corresponding time slot offset is k+n, and the time slot in which the power control information required by the terminal equipment for uplink transmission is obtained by subtracting (k+n) from (i+n) according to the sequence number of the time slot and the corresponding time slot offset, wherein i, k and n are natural numbers; or the plurality of continuous uplink time slots are used as a time slot group, the sequence number of the time slot group is the same as the sequence number of the first time slot in the plurality of continuous uplink time slots, and the time slot in which the power control information required by the terminal equipment for uplink transmission is positioned is obtained according to the sequence number of the time slot group and the time slot offset information. From the effect, for the scenario of uplink multislot aggregation, one feasible way is that the uplink multislot applies the same or similar power control mechanism as the first slot in the multislot respectively, so as to simplify the control signaling design and improve the system performance.

In one possible implementation, the control signaling is layer one or layer two control signaling, the indication information is uplink scheduling information, the uplink scheduling information may be uplink grant, the uplink scheduling information includes the time slot offset information, and the uplink physical channel is a physical uplink shared channel. The control signaling may also be higher layer control signaling. The layer one or layer two control signaling referred to herein may be similar to the physical layer signaling referred to in the communication standard, and the higher layer control signaling referred to herein may be radio resource control signaling (Radio Resource Control, RRC) signaling or broadcast signaling in the communication standard.

In one possible implementation manner, the slot offset information may further include a plurality of slot offsets, where each of the plurality of slot offsets represents an offset between a plurality of slots in which a plurality of pieces of power control information required for uplink transmission by the terminal device are respectively located and a slot scheduled to the terminal device for transmitting an uplink physical channel; the terminal equipment can acquire a plurality of time slots in which a plurality of pieces of power control information required by the terminal equipment for uplink transmission respectively corresponding to the plurality of time slot offset amounts are positioned according to the plurality of time slot offset amounts. In this way, the terminal equipment can dynamically obtain the power control information related to uplink power control, such as closed-loop parameter indication information, without the need of static proportion of uplink and downlink subframes, so that the method can meet the requirements of future mobile communication and improve the system performance.

In one possible implementation, the control signaling is layer one or layer two control signaling, the indication information is downlink scheduling information, the downlink scheduling information includes the plurality of time slot offsets, and the uplink physical channel is a physical uplink control channel. The control signaling may also be higher layer control signaling. The layer one or layer two control signaling referred to herein may be similar to the physical layer signaling referred to in the communication standard, and the higher layer control signaling referred to herein may be radio resource control signaling (Radio Resource Control, RRC) signaling or broadcast signaling in the communication standard. .

In a second aspect, an embodiment of the present application provides a method for controlling uplink transmit power, which is mainly set forth from the perspective of a radio access network device, where the method in the second aspect and various possible implementations thereof include: various technical aspects performed by the radio access network device in the foregoing first aspect and various possible implementations thereof are described.

In a third aspect, an embodiment of the present application provides a method for controlling uplink transmit power, where the method is mainly proposed from the perspective of a terminal device, and the method includes: the terminal equipment receives control signaling from the wireless access network equipment; the control signaling contains a plurality of indication information, each of which contains power control information required for a terminal device to transmit an uplink physical channel; the terminal equipment obtains power control information required by the terminal equipment to send an uplink physical channel from the plurality of indication information. Therefore, the terminal equipment can dynamically obtain the power control information related to the uplink power control, such as closed-loop parameter indication information, without static proportion based on the uplink and downlink subframes, so that the method can meet the requirements of future mobile communication and improve the system performance.

In one possible implementation, the time slot in which the control signaling is located is the last time slot containing the control signaling detected before the terminal device transmits the uplink physical channel.

In one possible implementation, the terminal device belongs to a terminal device group, and each of the plurality of indication information corresponds to a plurality of terminal devices in the terminal device group.

In one possible implementation, the control signaling is layer one or layer two signaling; the terminal device obtaining power control information required by the terminal device to send an uplink physical channel from the plurality of indication information, including: the layer one or layer two signalling carries power control information for the group of terminal devices, the layer one or layer two signalling being scrambled using a radio network identity, e.g. using a radio network temporary identity (Radio Network Temporary Identifier, RNTI) for the group of terminal devices; the terminal equipment uses the wireless network temporary identifier to detect the layer one or layer two signaling and obtains the power control information for the terminal equipment group; the terminal equipment obtains power control information required by the terminal equipment for sending an uplink physical channel from the power control information for the terminal equipment group according to the corresponding relation between the content in the obtained power control information for the terminal equipment group and the terminal equipment; the uplink physical channel is a physical uplink shared channel or a physical uplink control channel. . The layer one or layer two control signaling referred to herein may be similar to the physical layer signaling referred to in the communication standard, and the higher layer control signaling referred to herein may be radio resource control signaling (Radio Resource Control, RRC) signaling or broadcast signaling in the communication standard.

In a fourth aspect, an embodiment of the present application provides a method for controlling uplink transmit power, which is mainly set forth from the perspective of a radio access network device, where the method in the fourth aspect and various possible implementations thereof include: with the foregoing third aspect and various possible implementations thereof, the various technical aspects are performed by a radio access network device.

In a fifth aspect, an embodiment of the present application further provides a method for uplink power control, where the method is mainly proposed from the perspective of a terminal device, and the method includes: the terminal equipment receives control signaling from the wireless access network equipment; the control signaling comprises a plurality of indication information, and at least two of the plurality of indication information respectively comprises power control information required by the terminal equipment for transmitting an uplink physical channel; the terminal device uses the power control information which is respectively contained in the at least two indication information and is used for the terminal device to send the uplink physical channel. According to the scheme, the terminal equipment can dynamically obtain the power control information related to the uplink power control of the terminal equipment, such as closed-loop parameter indication information, without static proportion based on uplink and downlink subframes, so that the method can meet the requirements of future mobile communication and improve the system performance.

In one possible implementation, the control signaling is layer one or layer two signaling, which is scrambled by the radio network temporary identity; the process of the terminal equipment obtaining the power control information required by the terminal equipment for transmitting the uplink physical channel comprises the following steps: the terminal equipment detects the layer one or layer two signaling according to the wireless network temporary identifier, and obtains power control information required by the terminal equipment for sending an uplink physical channel; the terminal equipment obtains power control information corresponding to uplink control information sent by the terminal equipment from the plurality of indication information according to the corresponding relation between the plurality of indication information in the layer one or layer two signaling and the terminal equipment. The layer one or layer two control signaling referred to herein may be similar to the physical layer signaling referred to in the communication standard, and the higher layer control signaling referred to herein may be radio resource control signaling (Radio Resource Control, RRC) signaling or broadcast signaling in the communication standard.

In a sixth aspect, an embodiment of the present application provides a method for controlling uplink transmit power, where the method is mainly set forth from the perspective of a radio access network device, and the sixth aspect and various possible implementation manners thereof include: various technical aspects performed by the radio access network device in the foregoing fifth aspect and various possible implementations thereof are described.

In a seventh aspect, an embodiment of the present application further provides a communication device, where the communication device has a function of a terminal device in the method for implementing uplink transmission power control in the first aspect, the third aspect, and the fifth aspect, where the function may be implemented by hardware, or may be implemented by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions or method steps described above. For example, the communication device may include a receiver and a processor, and may further include a transceiver.

In an eighth aspect, an embodiment of the present application further provides a communication device, where the communication device has a function of the radio access network device in the method for implementing uplink transmission power control in the second aspect, the fourth aspect, and the sixth aspect, where the function is implemented by hardware, and the function is implemented by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions or method steps described above. For example, the communication device may include a receiver and a processor, and may further include a transceiver.

In a ninth aspect, an embodiment of the present invention provides a terminal device, including: a processor, a memory, a transceiver and a bus, the processor, the memory, the transceiver being coupled by the bus, the memory being for storing instructions, the transceiver being for communicating with a radio access network device, the processor being for executing the instructions stored in the memory to cause the terminal device to perform the method of uplink transmit power control performed at the terminal device side as exemplified in the first aspect, the third aspect and the fifth aspect, respectively.

In a tenth aspect, an embodiment of the present invention provides a radio access network device, including: a processor, a memory, a transceiver and a bus, the processor, the memory, the transceiver being coupled by the bus, the memory being for storing instructions, the transceiver being for communicating with a terminal device, the processor being for executing the instructions stored in the memory to cause the radio access network device to perform the above-described second aspect, fourth aspect and sixth aspect of the method of uplink transmit power control performed at the radio access network device side, respectively.

In an eleventh aspect, an embodiment of the present invention provides a computer readable medium, where the computer readable medium includes computer executable instructions for causing a terminal device to perform the above first aspect, the third aspect, and the fifth aspect of the present invention respectively illustrate a method for uplink transmission power control performed on a terminal device side.

In a twelfth aspect, an embodiment of the present invention provides a computer readable medium, where the computer readable medium includes computer executable instructions for causing a terminal device to perform the above second aspect, fourth aspect, and sixth aspect of the present invention, respectively, of the method for uplink transmission power control performed on a radio access network device side.

In a thirteenth aspect, an embodiment of the present invention provides a system chip, which is applicable to a terminal device, the system chip including: at least one communication interface, at least one processor, at least one memory, the communication interface, the memory and the processor being interconnected by a bus, the processor, by executing instructions stored in the memory, enabling the terminal device to perform the method of the first aspect, the third aspect and the fifth aspect of the invention, respectively, as exemplified at the terminal device side.

In a fourteenth aspect, an embodiment of the present invention provides a system chip, which is applicable to a radio access network device, including: at least one communication interface, at least one processor, at least one memory, the communication interface, the memory and the processor being interconnected by a bus, the processor, by executing instructions stored in the memory, enabling the radio access network device to perform the method of the second aspect, the fourth aspect, and the sixth aspect of the invention, respectively, as exemplified at the radio access network device side.

In a fifteenth aspect, the present invention provides a communication system comprising a terminal device for performing the methods of the first, third and fifth aspects of the invention, and a radio access network device for performing the methods of the second, fourth and sixth aspects of the invention, respectively.

According to the method and the device for controlling the uplink transmission power, the terminal device receives the control signaling from the wireless access network device, and the terminal device obtains the time slot where the power control information required by the terminal device for uplink transmission is located according to the control signaling, so that the terminal device can acquire the power control information required by uplink transmission on the time slot where the power control information required by uplink transmission is located. Through the possible implementation manner of each aspect provided by the embodiment of the invention, the terminal equipment can dynamically acquire the power control information related to the uplink transmission power control, such as the closed loop power control parameter indication information, without the static proportion based on the uplink and downlink subframes, so that the method can meet the requirements of future mobile communication and improve the system performance.

Drawings

FIG. 1 is a schematic diagram of the uplink and downlink subframe ratio of a system in the prior art;

FIG. 2 is a schematic diagram of an applicable system architecture according to an embodiment of the present application;

fig. 3 is a flowchart of a method for uplink transmit power control according to an embodiment of the present application;

fig. 4 is a flowchart of a method for uplink transmit power control according to an embodiment of the present application;

fig. 5 is a flowchart of a method for uplink transmit power control according to an embodiment of the present application;

fig. 6 is a schematic diagram of a method for uplink transmit power control according to an embodiment of the present application;

fig. 7 is a schematic diagram of a method for uplink transmit power control according to an embodiment of the present application;

fig. 8 is a schematic diagram of a method for uplink transmit power control according to an embodiment of the present application;

fig. 9 is a schematic diagram of a method for uplink transmit power control according to an embodiment of the present application;

fig. 10 is a schematic diagram of a method for uplink transmit power control according to an embodiment of the present application;

fig. 11 is a schematic diagram of a method for uplink transmit power control according to an embodiment of the present application;

fig. 12 is a schematic diagram of a method for uplink transmit power control according to an embodiment of the present application;

Fig. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a radio access network device according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a radio access network device according to an embodiment of the present application;

FIG. 17 is a schematic diagram of a system-on-chip structure according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of a system chip according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

The radio access network device mentioned in the embodiment of the application is a device deployed in a radio access network to provide a wireless communication function for terminal equipment. The radio access network device may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, transmission and reception points (Transmission Reception Point, TRP), and the like. In systems employing different radio access technologies, the names of network device-capable devices may vary. For convenience of description, in all embodiments of the present application, the above-mentioned apparatus for providing a wireless communication function for a terminal device is collectively referred to as a network device.

The terminal device involved in the embodiments of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, which have wireless communication functions. The terminal device may also be referred to as a Mobile Station (MS), a user equipment (ue), a terminal device (terminal equipment), a subscriber unit (cu), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a personal digital assistant (personal digital assistant, PDA) computer, a tablet, a wireless modem, a handheld device (handhold), a laptop (lapop computer), a cordless phone (cord phone) or a wireless local loop (wireless local loop, WLL) station, a machine type communication (machine type communication, MTC) terminal device, etc. The terminal device may also be fixed location device having similar wireless communication functionality as the terminal device described above. For convenience of description, in all embodiments of the present application, the above-mentioned devices are collectively referred to as terminal devices.

When the NR supports flexible allocation of uplink and downlink resources Per slot (Per-slot) level, this means that no-proportioning dynamic TDD operation will be supported in the NR. One problem to be solved by the embodiments of the present application is: in the case that uplink and downlink (DL/UL) subframes are not proportioned, the original closed-loop power control parameter indication mechanism cannot be applied to NR, how to define the closed-loop power control parameter indication mechanism to adapt to the dynamic TDD operation in the case that DL/UL is not proportioned.

The letters i, j, k, m, etc. referred to by the slot numbers in the present application may be generally used to represent natural numbers, and will not be described in detail herein.

In the eIMTA feature of a long term evolution (Long Term Evolution, LTE) system, a dual-loop uplink power control enhancement scheme based on a subframe set is adopted, including open-loop power control enhancement and closed-loop power control enhancement. As shown in fig. 1, fig. 1 is a schematic diagram of the ratio of uplink to downlink subframes in the prior art, where D represents a downlink subframe, U represents an uplink subframe, S represents a special subframe, the special subframe is used for downlink and uplink switching, the length is the same as that of other subframes, and the period in which a general special subframe occurs can be specified to be 5 ms or 10 ms. The set of subframes shown in the fig. 1 wireframe with subframe numbers 3,4,6,7,8, and 9 are variable subframes, and the other numbered subframes are fixed subframe sets. The different subframe sets are semi-statically configured by the network side, wherein for a variable subframe set there is cross-interference between user equipment and user equipment (UE-UE), and for a fixed subframe set there is no cross-interference between UE-UE, so different sets of power control parameters are employed for two different types of subframe sets.

For open loop power control enhanced schemes, different open loop power control parameters are set for two types of subframe sets (variable subframe set, fixed subframe set). For closed loop power control enhanced schemes, different closed loop power control commands (Transmitter Power Control, TPC) are accumulated for two types of subframe sets (variable subframe set, fixed subframe set).

Currently, the scheme of power control of the physical uplink shared channel (Physical Uplink Shared Channel: PUSCH) is that if c refers to a Serving Cell (Serving Cell), if the UE only transmits PUSCH and there is no physical uplink control channel (Physical Uplink Control Channel, PUCCH), the uplink transmission power of the UE can be determined as:

if the UE simultaneously transmits PUSCH and PUCCH for serving cell c, the transmission power of PUSCH may be determined as:

wherein P is _CMAX,c (i) Indicating the maximum transmission power of the UE,is a linear value thereof; m is M _PUSCH,c (i) A Resource Block (RB) number indicating a number of RB allocated to the ue pusch transmission; PLc is the path loss estimate for the downlink, α _c (j) Is a path loss compensation factor; p (P) _{O_PUSCH,c} (j) Indicating the power the base station expects to receive, there are two parts: p (P) _{O_PUSCH,c} (j)＝P _{O_UE_PUSCH,c} (j)+P _{O_NOMINAL_PUSCH,c} (j) Wherein P is _{O_NOMINAL_PUSCH,c} (j) Is a cell-specific parameter configured by higher layer signaling, P _{O_UE_PUSCH,c} (j) UE parameters configured by higher layer signaling of the system, such as defined in an uplink power control information cell (UplinkPowerControl information elements) specified in 3gpp TS 36.331:

in addition, in the above formulas (1) and/or (2),is an offset value related to modem (Modulation and Coding Scheme, MSC), only K _S =0 and K _S Two cases =1.25, where K _S Is configured by a higher layer parameter deltaMCS-Enabled, such as by definition of an uplink power control information cell (UplinkPowerControl information elements) specified in 3gpp TS 36.331:

control information bpre=o for PUSCH transmission without uplink shared channel (UL-SCH) data _CQI /N _RE ，Where C is the number of code blocks, K _r Is the size of code block r, O _CQI Is the number of CQI/PMI bits including CRC check bits. N (N) _RE Is RE (Resource)elements) number of values of Is the number of single carrier FDMA (Single Carrier Frequency Division Multiple Access, SC-FDMA) symbols carrying PUSCH data in the initial PUSCH transmission subframe. />Is the number of subcarriers to which the initial PUSCH transmission subframe is scheduled for allocation. Control data for PUSCH transmission without UL-SCH data transmission, +. >Otherwise 1.f (f) _c (i) Indicating the power adjustment size associated with TPC command.

Wherein if the Accumulation mode is indicated by the higher layer signaling parameter accounting-enabled, f _c (i)＝f _c (i-1)+δ _PUSCH,c (i-K _PUSCH )，f _c,2 (i)＝f _c,2 (i-1)+δ _PUSCH,c (i-K _PUSCH )；

If an absolute value mode is adopted, f _c (i)＝δ _PUSCH,c (i-K _PUSCH )，f _c,2 (i)＝δ _PUSCH,c (i-K _PUSCH ). Wherein delta _PUSCH,c (i-K _PUSCH ) Is composed of sub-frames i-K _PUSCH The TPC parameter in the upper downlink control information (Downlink Control Information, DCI) indicates. K (K) _PUSCH For TDD UL/DL configurations 1-6, is given by the following table:

for the case where configuration is 0, if PUSCH transmitted in subframe 2 or 7 has the least significant bit of its UL index of 1, K _PUSCH =7; in the case of the other cases where the number of the cells is not equal,K _PUSCH the determination is shown in the table above.

Currently, in the power control scheme for PUCCH, if the serving cell c is a primary cell (primary cell), for PUCCH format1/1a/1b/2/2a/2b/3, the power of PUCCH may be determined as:

wherein delta is _{F_PUCCH} (F) Is a parameter configured by high-level signaling, delta _TxD (F') when the UE is configured to transmit PUCCH on two antenna ports, its value is configured by higher layer parameters, otherwise Δ _TxD (F')＝0。h(n _CQI ,n _HARQ ,n _SR ) Is a parameter value related to PUCCH Format, n _CQI Corresponds to information bits representing channel quality information (Channel Quality Information, CQI). For UEs that do not have UL-SCH transport block to transmit, n if subframe i is configured for transmission SR (scheduling request) _SR =1, otherwise, n _SR ＝0。n _HARQ Is a parameter related to HARQ-ACK bits. g (i) represents the power adjustment size related to TPC command.For TDD, M and k _m Determined by the following table:

if the serving cell c is a primary cell, for PUCCH format 4/5, the power of the PUCCH may be

In addition, the current power control scheme for the channel sounding reference signal SRS (Sounding Reference Symbol, SRS) is,

P _SRS,c (i)＝min{P _CMAX,c (i),P _{SRS_OFFSET,c} (m)+10log ₁₀ (M _SRS,c )+P _{O_PUSCH,c} (j)+α _c (j)·PL _c +f _c (i) Wherein P _{SRS_OFFSET,c} (m) is a parameter configured by a higher layer semi-static state, and relates to a trigger mode of SRS transmission.

For the current power control scheme, it can be seen that the time slot (slot) where the TPC parameter indication information is located is determined based on the DL/UL ratio, and is given by a value table under different configurations, and obviously, the manner of determining the TPC parameter cannot meet the parameter indication requirement in the NR Fully Dynamic TDD, i.e., the DL/UL switching scenario of the Per-slot.

In view of this, in the embodiment of the present invention, the scheme design of uplink power control is performed using Fully Dynamic TDD in NR discussion as a scenario, so as to provide a solution to the problem of how to perform TPC parameter indication in a scenario where the ratio of uplink and downlink subframes is not predefined.

The embodiment of the invention can be applied to an LTE or 5G NR system, and the invention is not limited to a system which is particularly applicable.

As shown in fig. 2, fig. 2 is a schematic system architecture of one applicable embodiment of the present invention, where descriptions of each network element and interface are as follows:

the mobility management entity (Mobility Management Entity, MME) is a key control node in the LTE system defined by 3GPP, belongs to a core network element, and is mainly responsible for a signaling processing part, i.e., a control plane function, including functions such as access control, mobility management, attach and detach, session management, and gateway selection. The Serving GateWay (S-GW) is an important network element of the core network in the 3GPP LTE system, and is mainly responsible for the user plane function of user data forwarding, i.e., routing and forwarding of data packets under the control of the MME.

An Evolved Node B (eNodeB) is a base station in the LTE system, and is mainly responsible for radio resource management, qoS management, data compression, encryption, and other functions on the air interface side. And (3) forwarding control plane signaling to the MME and forwarding user plane service data to the S-GW by the eNB mainly towards the core network side. Note that, in NR, the entity concept corresponding to eNB is transmission/reception point (Transmission Reception Point, TRP).

The User Equipment (UE) is a device in the LTE system that accesses the network through the eNB, and may be, for example, a handheld terminal, a notebook computer, or other devices that may access the network.

S1 interface: is a standard interface between the eNB and the core network. The eNB is connected with the MME through an S1-MME interface and is used for controlling the transmission of signaling; the eNB is connected with the S-GW through an S1-U interface and is used for transmitting user data. Wherein the S1-MME interface and the S1-U interface are collectively called as an S1 interface.

X2 interface: and the standard interface between the eNBs is used for realizing the intercommunication between the base stations.

Uu interface: the Uu interface is a wireless interface between the UE and the base station, and the UE accesses to the LTE network through the Uu interface.

The network element related to the embodiment of the application comprises: the radio access network device and the terminal device, such as the radio access network device, may be an eNodeB, TRP, etc., and the terminal device may be a UE, etc., which is not limited herein.

Generally, based on possible system application scenarios such as LTE or 5G NR, an embodiment of the present application proposes a method for controlling uplink transmission power, as shown in fig. 3, where the method includes:

step 301: the wireless access network equipment sends signaling to the terminal equipment;

step 302: the terminal equipment receives the signaling from the wireless access network equipment;

step 303: the terminal equipment acquires a time slot in which power control information required by the terminal equipment for uplink transmission is located according to the signaling;

Step 304: the terminal equipment obtains the power control information required by the uplink transmission on the time slot where the power control information required by the uplink transmission is located.

Therefore, the terminal equipment can dynamically obtain the power control information related to the uplink power control, such as closed-loop power control parameter indication information, without static proportion based on the uplink and downlink subframes, so that the method can meet the requirements of future mobile communication and improve the system performance.

Optionally, in one possible implementation manner, the signaling includes indication information, where the indication information includes timeslot offset information, where the timeslot offset information is used to indicate an offset between a timeslot where power control information required for uplink transmission by the terminal device is located and a timeslot scheduled to the terminal device for transmitting an uplink physical channel, and the terminal device can learn, according to the signaling, for example, the timeslot where power control information required for uplink transmission by the terminal device is located according to the timeslot offset.

In one possible implementation, the time slots scheduled at a time to the terminal device for transmitting the uplink physical channel are aggregated time slots composed of a plurality of consecutive uplink time slots, and the terminal device transmits the uplink physical channel by applying the power control information in each of the aggregated time slots. In this way, for the scenario of uplink time slot aggregation, each uplink time slot can transmit the uplink physical channel by using the power control information, so that the terminal device can dynamically obtain the power control parameter information related to uplink power control, such as closed-loop parameter indication information, without based on static proportion of uplink and downlink subframes.

In one possible implementation, the terminal device uses the power control information to transmit an uplink physical channel in each of the plurality of consecutive uplink timeslots, including: when the calculation mode of the power control information is the accumulation mode, the transmission power of other time slots after the first time slot is the same as the transmission power of the first time slot in the plurality of continuous uplink time slots; or under the condition that the calculation mode of the power control information is an absolute value mode, in the plurality of continuous uplink time slots, the sequence number of the first time slot is i, the corresponding time slot offset is k, the sequence number of the subsequent time slot is i+n, the sequentially corresponding time slot offset is k+n, and the time slot in which the power control information required by the terminal equipment for uplink transmission is obtained by subtracting (k+n) from the sequence number of the time slot and the corresponding time slot offset, wherein i, k and n are natural numbers; or the plurality of continuous uplink time slots are used as a time slot group, the sequence number of the time slot group is the same as the sequence number of the first time slot in the plurality of continuous uplink time slots, and the time slot in which the power control information required by the terminal equipment for uplink transmission is positioned is obtained according to the sequence number of the time slot group and the time slot offset information. From the effect, for the scenario of uplink multislot aggregation, one feasible way is that the uplink multislot applies the same or similar power control mechanism as the first slot in the multislot respectively, so as to simplify the signaling design and improve the system performance.

In one possible implementation, the signaling is layer one or layer two control signaling, the indication information is uplink scheduling information, the uplink scheduling information includes the time slot offset information, and the uplink physical channel is a physical uplink shared channel. The signaling may also be higher layer signaling. The layer one or layer two control signaling referred to herein may be similar to the physical layer signaling referred to in the communication standard, and the higher layer control signaling referred to herein may be radio resource control signaling (Radio Resource Control, RRC) signaling or broadcast signaling in the communication standard.

In one possible implementation, the signaling is layer one or layer two control signaling, the indication information is downlink scheduling information, the downlink scheduling information includes the plurality of time slot offsets, and the uplink physical channel is a physical uplink control channel. The signaling may also be higher layer signaling. The layer one or layer two control signaling referred to herein may be similar to the physical layer signaling referred to in the communication standard, and the higher layer control signaling referred to herein may be radio resource control signaling (Radio Resource Control, RRC) signaling or broadcast signaling in the communication standard.

According to the uplink transmission power control method provided by the embodiment, the terminal equipment receives the signaling from the wireless access network equipment, and according to the signaling, the time slot where the power control information required by the terminal equipment for uplink transmission is located can be obtained, so that the terminal equipment can acquire the power control information required by uplink transmission on the time slot indicated by the signaling, the terminal equipment can dynamically acquire the power control information related to uplink transmission power control of the terminal equipment, such as closed loop power control parameter indication information, without static proportion based on uplink and downlink subframes, and the requirement of future mobile communication can be met, and the system performance is improved.

In general, based on possible system application scenarios such as LTE or 5G NR, the embodiment of the present application further provides a method for controlling uplink transmission power, as shown in fig. 4, and fig. 4 is a flowchart of a method for controlling uplink transmission power provided by the embodiment of the present application, where the method includes:

step 401: the wireless access network equipment sends a signaling to the terminal equipment, wherein the signaling comprises a plurality of indication information, and each indication information comprises power control information required by one terminal equipment for sending an uplink physical channel;

step 402: the terminal equipment receives the signaling sent by the wireless access network equipment;

step 403: the terminal equipment obtains power control information required by the terminal equipment to send an uplink physical channel from the plurality of indication information.

Therefore, the terminal equipment can dynamically obtain the power control information related to the uplink power control, such as closed-loop parameter indication information, without static proportion based on the uplink and downlink subframes, so that the method can meet the requirements of future mobile communication and improve the system performance.

In one possible implementation, the time slot in which the signaling is located is the last time slot containing the signaling detected before the terminal device transmits the uplink physical channel.

In one possible implementation, the terminal device belongs to a terminal device group, and each of the plurality of indication information corresponds to at least one terminal device in the terminal device group.

In one possible implementation, the signaling is layer one or layer two (L1/L2) control signaling, the L1/L2 signaling indicating power control information of a group of terminals, the L1/L2 signaling for carrying the power control information of the group of terminals being scrambled by a terminal group specific RNTI (Radio-Network Temporary Identifier, radio network temporary identity); the terminal detects the L1/L2 signaling according to the RNTI, and power control information indicating the group of terminals is obtained; the terminal obtains a power control information field corresponding to the terminal from the power control information of the group of terminals according to the index relation between the power control information field in the L1/L2 signaling and the terminal; and the terminal determines specific parameter information of the uplink transmission power according to the power control information field.

In general, based on possible system application scenarios such as LTE or 5G NR, the embodiment of the present application further provides a method for controlling uplink transmission power, as shown in fig. 5, and fig. 5 is a flowchart of a method for controlling uplink transmission power provided by the embodiment of the present application, where the method includes:

Step 501: the wireless access network equipment sends a signaling to the terminal equipment, wherein the signaling comprises a plurality of indication information, and at least two of the plurality of indication information respectively comprise power control information required by the terminal equipment for sending an uplink physical channel;

step 502: the terminal equipment receives the signaling sent by the wireless access network equipment;

step 503: the terminal device uses the power control information which is respectively contained in the at least two indication information and is used for the terminal device to send the uplink physical channel.

According to the scheme, the terminal equipment can dynamically obtain the power control information related to the uplink power control of the terminal equipment, such as closed-loop parameter indication information, without static proportion based on uplink and downlink subframes, so that the method can meet the requirements of future mobile communication and improve the system performance.

In one possible implementation, the control signaling is layer one or layer two signaling, which is scrambled by the radio network temporary identity; the process of the terminal equipment obtaining the power control information required by the terminal equipment for transmitting the uplink physical channel comprises the following steps: the terminal equipment detects the layer one or layer two signaling according to the wireless network temporary identifier, and obtains power control information required by the terminal equipment for sending an uplink physical channel; the terminal equipment obtains power control information corresponding to uplink control information sent by the terminal equipment from the plurality of indication information according to the corresponding relation between the plurality of indication information in the layer one or layer two signaling and the terminal equipment; the indication information may be downlink grant information, and the uplink physical channel is a physical uplink control channel or a physical uplink shared channel. The signaling may also be higher layer signaling. The layer one or layer two control signaling referred to herein may be similar to the physical layer signaling referred to in the communication standard, and the higher layer control signaling referred to herein may be radio resource control signaling (Radio Resource Control, RRC) signaling or broadcast signaling in the communication standard.

For PUSCH transmission power control, optionally, in the context of the system shown in fig. 2, if the radio access network device indicates that power control adopts accumulation mode by parameters in higher layer signaling, then f _c (i)＝f _c (i-1)+δ _PUSCH,c (i-K _PUSCH )，f _c,2 (i)＝f _c,2 (i-1)+δ _PUSCH,c (i-K _PUSCH ) The method comprises the steps of carrying out a first treatment on the surface of the If the power control adopts an absolute value mode, f _c (i)＝δ _PUSCH,c (i-K _PUSCH )，f _c,2 (i)＝δ _PUSCH,c (i-K _PUSCH ). Wherein delta _PUSCH,c (i-K _PUSCH ) May be defined by sub-frames i-K _PUSCH Indicated by TPC parameters in the DCI above. K (K) _PUSCH The indication mode of (a) may include: the radio access network device sends a signaling to the terminal device, where the signaling includes indication information, where the indication information is used to indicate a slot (slot) where a TPC parameter is required to be used in PUSCH power control of the terminal device, where the indication information may be an offset value, where the offset value indicates offset (offset) information of the slot (slot) where the TPC parameter is located relative to a slot scheduled to the terminal device (e.g., UE) for transmitting an uplink physical channel.

Alternatively, the indication information may be uplink scheduling information, such as uplink Grant (UL Grant) information, and one possible design is to add the indication information of the offset to the UL Grant information. The uplink scheduling information may be included in the downlink control information and transmitted to the terminal. Optionally, some transmission formats of DCI are used to send the UL Grant information to the ue, for example, indication information of adding offset in DCI format 0 or format 4 (specifically used format is not limited in this embodiment): the indication information of the offset can be used for indicating the slot position of the TPC command information of the scheduled UE by using n bits, so that after the terminal equipment acquires the slot position, the power control information required by the terminal equipment for executing the PUSCH uplink transmission is analyzed on the slot.

An alternative specific implementation manner is as follows: the time slot j is the time slot in which the UL Grant information issued by the network side is located, and the time slot number which is scheduled to the terminal equipment for uplink transmission is indicated as i by the UL Grant information; the UL Grant information includes indication information for indicating an offset (offset) of a slot in which TPC parameters required for the scheduled UE are located with respect to a slot i in which uplink data is scheduled by the UE. Assuming that the offset value UL Grant TPC slot offset is k, then:

when i-k > j, as shown in fig. 6, fig. 6 is a schematic diagram of a method for uplink transmit power control according to an embodiment of the present application, where UL Grant information sent on a slot j and TPC parameter indication information related to uplink power control of a UE scheduled by the UL Grant are located in different slots, and UL Grant indicates that TPC parameters of the slot j are located in slots i-k, i-k > j.

When i-k=j, as shown in fig. 7, fig. 7 is a schematic diagram of a method for uplink transmit power control according to an embodiment of the present application, where UL Grant information sent on a slot j and TPC parameter indication information related to uplink power control of a UE scheduled by the UL Grant are located in the same slot. UL Grant indicates that TPC parameters for slot j are located at slot i-k, and i-k=j.

The technical solutions illustrated in fig. 6 and fig. 7 and the corresponding descriptions thereof can be applied to a scenario in which the ratio of uplink to downlink subframes is not predefined (for example, DL and UL switching of Per-slot), so as to solve the problem that TPC parameters of PUSCH cannot be indicated in the scenario.

In this embodiment, the radio access network device sends a signaling to the terminal device, where the signaling includes indication information, where the indication information may be used to indicate a time slot in which a TPC parameter required in PUSCH power control of the terminal device is located, where the indication information may be an offset value, where the offset value indicates offset information of the time slot in which the TPC parameter is located relative to a time slot scheduled to the terminal device (for example, the terminal device is a UE) for sending uplink data. In one design, the indication information may be implemented by uplink Grant (UL Grant) information, for example, in the UL Grant information, representation information similar to or identical to the offset is added.

In this way, the scheme of the embodiment can be applied to the scenario of DL and UL switching of Per-slot, wherein the indication of TPC parameters may not be generated based on the existing DL-UL subframe ratio, taking cooperation between TRP and TRP as an example, for the case that the Backhaul (Backhaul) between TRP and TRP is not ideal, when TRP schedules slot i in slot j, neighbor cell scheduling information cannot be obtained, TPC command information transmitted uplink in slot i can be issued to UE after the base station obtains scheduling information of neighbor cells.

For the transmission power control mechanism of PUSCH, optionally, in the context of the system shown in fig. 2, if the accumulation mode is indicated by the higher layer signaling parameters, f _c (i)＝f _c (i-1)+δ _PUSCH,c (i-K _PUSCH )，f _c,2 (i)＝f _c,2 (i-1)+δ _PUSCH,c (i-K _PUSCH ) The method comprises the steps of carrying out a first treatment on the surface of the If an absolute value mode is adopted, f _c (i)＝δ _PUSCH,c (i-K _PUSCH )，f _c,2 (i)＝δ _PUSCH,c (i-K _PUSCH ). Wherein delta _PUSCH,c (i-K _PUSCH ) Is composed of sub-frames i-K _PUSCH Indicated by TPC parameters in the DCI, K when multiple consecutive uplink timeslots, i.e. an uplink timeslot aggregation scenario, are scheduled at a time for the same UE _PUSCH The indication mode of (2) is as follows: the offset of the slot where the TPC command related to PUSCH power control is located relative to the current slot is indicated by UL Grant, taking the case when the aggregation level is 2 as an example, as shown in fig. 8, fig. 8 is a schematic diagram of a method for uplink transmit power control provided in an embodiment of the present application, where in an uplink slot aggregation scenario, UL Grant indicates that the slot where the TPC parameter of the aggregation slot is located in slot i-k (including i-k>j and i-k=j), specifically, there may be three embodiments as follows:

1) If the TPC parameter calculation mode is the accumulation mode, the transmission power of other uplink timeslots after the first uplink timeslot is the same as the transmission power of slot i in the aggregated plurality of consecutive uplink timeslots.

2) If the TPC parameter calculation mode is an absolute value mode, among a plurality of consecutive uplink timeslots aggregated, the TPC slot offset of other uplink timeslots after the first uplink timeslot is sequentially added with 1, for example, the first uplink timeslot is numbered i, the corresponding TPC slot offset is numbered k, the subsequent uplink timeslot is numbered i+1, the corresponding TPC slot offset is numbered k+1, and so on.

3) Whether the TPC parameter calculation adopts the accumulation mode or the absolute value mode, the aggregated uplink slot may be regarded as an integral virtual slot, or a plurality of consecutive uplink slots scheduled for the same UE at a time may be regarded as a slot group, and then the virtual slot sequence number or slot group sequence number is the same as the sequence number of the first uplink slot in the aggregated slot, and the terminal may obtain its closed loop power control parameter according to the offset between the virtual slot number or slot group sequence number and the slot where the TPC parameter is located and the slot where the TPC parameter is scheduled for transmitting uplink data with respect to the UE.

The technical scheme of the embodiment solves the problem that the ratio of the uplink subframe to the downlink subframe is not predefined, namely, in the scene of switching between the uplink subframe and the downlink subframe of Per-slot, the TPC parameter indication of the PUSCH during the uplink time slot aggregation exists. The technical scheme of the embodiment is suitable for the scene of DL/UL switching of Per-slot, TPC parameter indication information in uplink time slot polymerization does not need to be based on DL/UL ratio, and a plurality of TPC command information is not required to be issued, aiming at non-ideal backshual existing between TRP and TRP, when TRP schedules slot i in slot j, neighbor cell scheduling information cannot be obtained, and TPC command of uplink transmission in slot i can be issued to UE after neighbor cell scheduling information is obtained by a base station.

The embodiment of the application also provides a power control mechanism for the PUCCH, optionally, the system shown in fig. 2 is taken as the background, and for the PUCCH, the determination formula of the closed loop parameters is as follows:for Per-slot DL/UL switching, i.e. when not based on DL/UL ratio, k is determined _m . The offset of the slot where the TPC parameter in PUCCH power control is located with respect to the slot where the UE is scheduled to transmit uplink control information may be indicated by DL Grant; DCI format 1A/1B/1D/1/2A/2/2B/2C/2D may be used for DL Grant transmission, e.g., adding the above-mentioned offset indication information in the DL Grant. The method is specifically as follows:

DCI format 1A/1B/1D/1/2A/2/2B/2C/2D

-k _m indicators

through the technical means, the offset indication information of the slot where the TPC command is located relative to the slot which is currently scheduled to be sent up is added. As shown in fig. 9, fig. 9 is a schematic diagram of a method for controlling uplink transmit power, where, for PUCCH, DL Grant indicates that m TPC parameters of slot i are located in slot i-k1, slot i-k2, …, slot i-km, respectively.

The technical scheme of the embodiment solves the problem of indicating the TPC parameter of the PUCCH under the condition that the ratio of the uplink subframe to the downlink subframe is flexible and is not predefined. Aiming at the non-ideal backschual existing between TRP-TRP, when TRP schedules slot i in slot j, the neighbor cell scheduling information cannot be obtained, and TPC command of uplink transmission in slot i can be sent to UE after the base station obtains the neighbor cell scheduling information. The technical scheme of the embodiment is suitable for the scene of DL/UL switching of Per-slot, and TPC parameter indication information of PUCCH is not based on DL/UL matching. Compared with the mode based on subframe static proportioning in the prior art, dynamic and flexible power control can be realized.

The embodiment of the application also provides a transmission power control mechanism for PUSCH, optionally, taking the system shown in fig. 2 as the background, for PUSCH, if the higher-layer signaling parameter accounting-enabled indicates that the Accumulation mode is adopted, f _c (i)＝f _c (i-1)+δ _PUSCHc, (i-K _PUSCH )，f _c,2 (i)＝f _c,2 (i-1)+δ _PUSCH,c (i-K _PUSCH ) The method comprises the steps of carrying out a first treatment on the surface of the If an absolute value mode is adopted, f _c (i)＝δPUSCHc,(i-K _PUSCH )，f _c,2 (i)＝δ _PUSCH,c (i-K _PUSCH ). Wherein delta _PUSCHc ,(i-K _PUSCH ) Is composed of sub-frames i-K _PUSCH Indicated by TPC parameters in the DCI above. In the technical scheme K _PUSCH Instead of displaying the indication, one design includes:

for PUSCH, the UE is not required to be notified of the offset of the slot where the TPC command in the power control is located relative to the slot where the UE is scheduled to transmit uplink data, and the last DCI specific to power control before the uplink slot transmission detected by the UE determines the value of the closed loop parameter in its uplink transmission power.

As shown in fig. 10, fig. 10 is a schematic diagram of a method for controlling uplink transmit power according to an embodiment of the present application, in which DCI of a UE-group specific informs TPC parameters of a group of UEs, the slot where the DCI is located does not need to explicitly inform the UEs, and the UE determines according to detection of the DCI before slot j transmits uplink data. Before issuing the DCI Format X, the base station completes the scheduling of the uplink UE on all slots j, for example, the design of the DCI Format X (similar to DCI Format 3/3A) is as follows: -TPC command number 1,TPC command number 2, …, TPC command number N; the CRC parity bits of DCI Format X may be scrambled by RNTI associated with a set of TPC parameters for the UE; the index parameters involved in TPC may be configured to the UE through higher layer signaling.

The technical scheme of the embodiment is suitable for being beneficial to the coordination power control among uplink UE and reducing the interference among the UE when the uplink non-orthogonal access exists, and a plurality of UE in the prior art are orthogonal access and can directly determine the uplink transmitting power according to the TPC related parameters; for the non-orthogonal situation, a part of frequency domain resources overlap in slot j, and power adjustment can be performed for uplink transmission of a specific UE, so as to reduce interference between UEs. Furthermore, for the DL/UL per-slot switching scene in the NR system, the method is favorable for completing information interaction between TRP and TRP in real time so as to be used for power control of uplink UE.

According to the technical scheme of the embodiment, the UE does not need to be explicitly informed of the offset of the slot where the TPC parameter in the PUSCH power control of the UE is located relative to the scheduled slot where uplink data is sent, and the UE controls specific DCI (for example, DCI aiming at the specific UE group) according to the detected power to determine the value of the closed loop parameter in the uplink transmission of the UE, so that signaling overhead is saved.

The embodiment of the application also provides a transmission power control mechanism for the PUCCH, optionally, with the system shown in fig. 2 as the background, comprising: the offset of the slot where the TPC command is located in the PUCCH power control, relative to the slot where the UE is scheduled to transmit uplink control information, does not need to explicitly notify the UE, and the last power detected by the UE controls a specific DCI (UE-specific DCI, which refers to only one UE) to determine the value of the closed-loop parameter in its uplink transmission power. As shown in fig. 11, fig. 11 is a schematic diagram of a method for controlling uplink transmit power according to an embodiment of the present application, where DCI Format X indicates TPC parameters corresponding to downlink slots that need HARQ (Hybrid Automatic Repeat Request, HARQ) feedback on slot j of UE 1.

Alternatively, the downlink transmission is typically associated with a downlink scheduling assignment on the PDCCH, the PUCCH transmitting HARQ acknowledgements in response to the downlink transmission; before the base station issues DCI Format X, the DL scheduling of all the HARQ feedback on slot j to UE1 is completed; the DCI Format X comprises a group of TPC command, which respectively correspond to DL slots needing to complete HARQ feedback at slot j; the technical scheme of the embodiment is suitable for a scene of DL/UL based on per-slot switching in NR, and is beneficial to TRP and TRP real-time interaction information for power control of PUCCH.

By the technical scheme of the embodiment, the network side can determine the value of the closed loop parameter in the uplink transmission of the UE according to the detected power control specific DCI without displaying the offset informing the UE that the slot where the TPC command is located in the PUCCH power control is relative to the slot where the UE is scheduled and transmits the uplink control information, thereby saving the signaling cost.

The embodiment of the application also provides a transmission power control mechanism for the PUCCH, optionally, taking the system shown in fig. 2 as the background, the scheme comprises: the offset of the slot where the TPC parameter indication information is located in the PUCCH power control relative to the slot where the UE is scheduled to transmit uplink control information does not need to notify the UE, and the last power detected by the UE controls the specific DCI (UE-group specific DCI) to determine the value of the closed loop parameter in the uplink transmission power. As shown in fig. 12, fig. 12 is a schematic diagram of a method for controlling uplink transmission power according to an embodiment of the present application, where DCI Format X indicates TPC parameters of a group of UEs that need to complete uplink HARQ feedback at slot j, optionally DL transmission is usually related to downlink scheduling allocation on PDCCH, and PUCCH transmits HARQ acknowledgement in response to downlink transmission; before the base station issues DCI Format X, the DL scheduling of all the UEs needing HARQ feedback on slot j is completed; the DCI Format X comprises TPC parameter indication information of a group of UE, and the TPC parameter indication information corresponds to the UE which needs to complete HARQ feedback in slot j; the method is suitable for the scene of DL/UL based on per-slot switching in NR, and is favorable for TRP and TRP real-time interaction information to be used for power control of PUCCH.

The technical scheme of the embodiment is suitable for a DL/UL per-slot switching scene in an NR system, is favorable for real-time interaction information between TRP and TRP to be used for power control of PUCCH, and by the scheme, a network side does not need to display an offset which informs UE that TPC command is positioned in PUCCH power control relative to the current slot, and the UE controls specific DCI (UE-group specific) according to the detected power to determine the value of a closed loop parameter in uplink transmission of the UE, so that system signaling overhead is further saved.

The embodiment of the invention can divide the functional units of the wireless access network equipment and the terminal equipment according to the method example, for example, the functional units can be divided into the functional units corresponding to each function or method step, and two or more functions can be integrated in one processing unit. The integrated units may be implemented in hardware or in software functional units. It should be noted that, in the embodiment of the present invention, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice.

In the case of adopting centralized units, fig. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 13, the terminal device 100 includes: a processing unit 12 and a communication unit 13. The processing unit 12 is configured to control and manage the executed actions of the terminal device (refer to any processing action executed at the terminal device side in fig. 3 to 12 and the corresponding embodiments of the present patent application), for example, the processing unit 12 may know a time slot in which the power control information required for uplink transmission of the terminal device is located according to the time slot offset information included in the signaling received from the network side, and so on, which is not described herein. The communication unit 13 is arranged to support communication between the terminal device and the radio access network device, e.g. to receive signaling messages or the like sent from the radio access network device. The terminal device may further comprise a storage unit 11 for storing program code and data needed by the terminal device to execute the embodiment of the invention.

The processing unit 12 may be a processor, such as a central processing unit (Central Processing Unit, CPU), a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an Application-specific integrated circuit (ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that performs the function of a computation, e.g., a combination comprising one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication unit 13 is a communication interface such as a transceiver, a transceiver circuit, or the like. The storage unit 11 may be a memory.

When the processing unit 12 is a processor, the communication unit 13 is a transceiver, and the storage unit 11 is a memory, the terminal device according to the embodiment of the present application may be a terminal device shown in fig. 14.

Fig. 14 is a schematic hardware structure of a terminal device according to an embodiment of the present application. As shown in fig. 14, the terminal device may include a transceiver 21, a processor 23, a memory 22, and a communication bus 20. The communication bus 20 is used to enable communication connections between components. Memory 22 may comprise high speed RAM memory and may also include nonvolatile storage NVM, such as at least one disk memory, in which memory 22 computer executable program code including instructions may be stored; the instructions, when executed by the processor 22, cause the processor 22 to perform various processing functions and perform any method steps or functions at the terminal side that are involved in implementing various embodiments of the application.

In the case of using an integrated unit, fig. 15 is a schematic structural diagram of a radio access network device according to an embodiment of the present invention. The radio access network device 300 includes: a processing unit 32 and a communication unit 33. The communication unit 33 is configured to support communication between the radio access network device and the terminal device, and the processing unit 32 is configured to control and manage actions of the radio access network device (refer to any processing action/function performed on the radio access network device side in fig. 3 to 12 and corresponding embodiments of the present patent application). For example: the processing unit 32 may generate a signaling message carrying the offset value, which the communication unit 33 may send to the terminal device. The radio access network device may further comprise a storage unit 31 for storing program code and data needed by the radio access network device to perform embodiments of the present invention.

The processing unit 32 may be a processor, such as a central processing unit (Central Processing Unit, CPU), a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an Application-specific integrated circuit (ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that performs the function of a computation, e.g., a combination comprising one or more microprocessors, a combination of a DSP and a microprocessor, and the like. The communication unit 33 may be a communication interface including a transceiver, a transceiver circuit, and the like. The storage unit 31 may be a memory.

When the processing unit 32 is a processor, the communication unit 33 is a transceiver, and the storage unit 31 is a memory, the radio access network device according to the embodiment of the present application may be a radio access network device shown in fig. 16. Fig. 16 is a schematic hardware structure of a radio access network device according to an embodiment of the present application. As shown in fig. 16, the radio access network device may include a communication interface 41, a processor 43, a memory 42, and a communication bus 40. The communication bus 40 is used to enable communication connections between components. Memory 42 may comprise high speed RAM memory or may also comprise non-volatile storage NVM, such as at least one magnetic disk memory, in which memory 42 computer-executable program code may be stored, including instructions; the instructions, when executed by the processor 42, cause the processor 42 to perform various processing functions and any method steps or functions that are required to be performed at the radio access network device side to implement the various embodiments of the present patent.

The embodiment of the application also provides a system chip, and fig. 17 is a schematic structural diagram of the system chip provided by the embodiment of the application. As shown in fig. 17, the system chip may be applied to a terminal device, and the system chip includes: at least one communication interface 51, at least one processor 53, at least one memory 52, said communication interface 51, memory 52 and processor 53 being interconnected by a bus 50, said processor, by executing instructions stored in said memory, enabling the terminal device to carry out any of the method steps or functions carried out at the terminal side in connection with the embodiments of the application.

The embodiment of the application also provides a system chip, and fig. 18 is a schematic structural diagram of the system chip provided by the embodiment of the application. As shown in fig. 12, the system chip may be applied to a radio access network device, and the system chip includes: at least one communication interface 61, at least one processor 63, at least one memory 62, said communication interface 61, memory 62 and processor 63 being interconnected by a bus 60, said processor, by executing instructions stored in said memory, enabling the radio access network device to perform any of the method steps or functions performed at the radio access network device side according to the embodiments of the present application.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

1. A method of uplink transmit power control, the method comprising:

the terminal equipment receives control signaling sent by the wireless access network equipment;

the terminal equipment acquires a time slot in which power control information required by the terminal equipment for uplink transmission is located according to the control signaling;

the terminal equipment acquires the power control information required by the uplink transmission from the time slot where the power control information required by the uplink transmission is located;

wherein the method comprises the following steps:

the control signaling comprises indication information, wherein the indication information comprises time slot offset information, and the time slot offset information is used for indicating the offset between a time slot where power control information required by the terminal equipment for uplink transmission is located and a time slot which is scheduled to the terminal equipment and used for transmitting an uplink physical channel;

the terminal equipment obtains the time slot where the power control information required by the terminal equipment for uplink transmission is located according to the control signaling, and the method comprises the following steps:

and the terminal equipment acquires the time slot where the power control information required by the terminal equipment for uplink transmission is located according to the time slot offset information contained in the control signaling.

2. The method according to claim 1, characterized in that the method comprises:

scheduling a time slot for transmitting an uplink physical channel to the terminal equipment as a time slot;

and the terminal equipment uses the power control information to send an uplink physical channel on the time slot.

3. The method according to claim 1, characterized in that the method comprises:

the time slot which is scheduled to the terminal equipment for sending the uplink physical channel at one time is a plurality of continuous uplink time slots, and the terminal equipment uses the power control information to determine the transmission power for sending the uplink physical channel on each time slot in the plurality of continuous uplink time slots.

4. A method according to claim 3, characterized in that the method comprises:

the terminal device applying the power control information on each of the plurality of consecutive uplink timeslots to determine a transmission power for transmitting an uplink physical channel, including:

when the calculation mode of the power control parameter is an accumulation mode, the transmission power of other time slots after the first time slot is the same as the transmission power of the first time slot in the plurality of continuous uplink time slots; or alternatively, the process may be performed,

Under the condition that the calculation mode of the power control parameters is an absolute value mode, in the plurality of continuous uplink time slots, the sequence number of the first time slot is i, the corresponding offset is k, the sequence number of the subsequent time slot is i+n, the sequentially corresponding time slot offset is k+n, and according to the sequence number of the time slot and the corresponding time slot offset, the time slot in which the power control information required by the terminal equipment for uplink transmission is obtained is (i+n) minus (k+n), wherein i, k and n are natural numbers; or alternatively, the process may be performed,

and taking the plurality of continuous uplink time slots as a time slot group, wherein the sequence number of the time slot group is the same as the sequence number of the first time slot in the plurality of continuous uplink time slots, and obtaining the time slot in which the power control information required by the terminal equipment for uplink transmission in the time slot group is positioned according to the sequence number of the time slot group and the time slot offset information.

5. The method according to any one of claims 1-4, wherein the method comprises:

the control signaling is layer one or layer two signaling, the indication information is uplink scheduling information, the uplink scheduling information contains the time slot offset information, and the uplink physical channel is a physical uplink shared channel.

6. The method according to claim 1, characterized in that the method comprises:

the time slot offset indication information comprises a plurality of time slot offsets, and each of the time slot offsets respectively represents the offset between a plurality of time slots where a plurality of pieces of power control information required by the terminal equipment for uplink transmission are respectively located and time slots which are scheduled to the terminal equipment and used for transmitting an uplink physical channel;

and the terminal equipment acquires a plurality of time slots in which a plurality of pieces of power control information required by the terminal equipment for uplink transmission respectively correspond to the time slot offset according to the time slot offset.

7. The method according to any one of claims 1 or 6, wherein the method comprises:

the control signaling is layer one or layer two signaling, the indication information is downlink scheduling information, the downlink scheduling information comprises the plurality of time slot offset, and the uplink physical channel is a physical uplink control channel.

8. A method of uplink transmit power control, the method comprising:

wherein the method comprises the following steps:

9. A method of uplink transmit power control, the method comprising:

the wireless access network equipment sends control signaling to the terminal equipment;

the control signaling contains the information of the time slot where the power control information required by the terminal equipment for uplink transmission is located, so that the terminal can acquire the power control information required by the uplink transmission on the time slot where the power control information required by the uplink transmission is located;

wherein the method comprises the following steps:

the control signaling includes information of a time slot in which the power control information required by the terminal device for uplink transmission is located, and the control signaling includes:

The control signaling contains indication information, the indication information contains time slot offset information, and the time slot offset information is used for indicating the offset between a time slot where power control information required by the terminal equipment for uplink transmission is located and a time slot scheduled to the terminal equipment for transmitting an uplink physical channel.

10. The method according to claim 9, characterized in that the method comprises: scheduling a time slot for transmitting an uplink physical channel to the terminal equipment as a time slot; the power control information is applied by the terminal device to transmit an uplink physical channel on the one slot.

11. The method according to claim 9, characterized in that the method comprises:

the time slot which is scheduled to the terminal equipment for transmitting the uplink physical channel at a time is a plurality of continuous uplink time slots, and the power control information is applied to each of the plurality of continuous uplink time slots by the terminal equipment to transmit the uplink physical channel.

12. The method according to claim 11, characterized in that the method comprises:

the power control information is applied by the terminal device to each of the plurality of consecutive uplink timeslots to transmit an uplink physical channel, including:

under the condition that the calculation mode of the power control parameters is an absolute value mode, in the plurality of continuous uplink time slots, the sequence number of the first time slot is i, the corresponding time slot offset is k, the sequence number of the subsequent time slot is i+n, the sequentially corresponding time slot offset is k+n, and according to the sequence number of the time slot and the corresponding time slot offset, the time slot in which the power control information required by the terminal equipment for uplink transmission is obtained is (i+n) minus (k+n), wherein i, k and n are natural numbers; or alternatively, the process may be performed,

and taking the plurality of continuous uplink time slots as a time slot group, wherein the sequence number of the time slot group is the same as the sequence number of the first time slot in the plurality of continuous uplink time slots, and obtaining the time slot in which the power control information required by the terminal equipment for uplink transmission is positioned according to the sequence number of the time slot group and the time slot offset information.

13. The method according to any one of claims 9-10, characterized in that the method comprises:

14. The method according to any one of claims 9 or 10, characterized in that the method comprises:

the time slot offset information comprises a plurality of time slot offsets, and the time slot offsets respectively represent offsets between a plurality of time slots where a plurality of pieces of power control information required by the terminal equipment for uplink transmission are respectively located and time slots which are scheduled to the terminal equipment and used for transmitting an uplink physical channel;

so that the terminal equipment can acquire a plurality of time slots in which a plurality of pieces of power control information required by the terminal equipment for uplink transmission respectively correspond to the plurality of time slot offset.

15. The method according to claim 9, characterized in that the method comprises:

16. A method of uplink transmit power control, the method comprising:

wherein the method comprises the following steps: the time slot which is scheduled to the terminal equipment for transmitting the uplink physical channel at a time is a plurality of continuous uplink time slots, and the power control information is applied to each of the plurality of continuous uplink time slots by the terminal equipment to transmit the uplink physical channel.

17. A method of uplink transmit power control, the method comprising:

the terminal equipment receives control signaling from the wireless access network equipment;

the control signaling comprises a plurality of indication information, and each indication information comprises power control information required by one terminal device for sending an uplink physical channel;

the terminal equipment acquires power control information needed by the terminal equipment for transmitting an uplink physical channel from the plurality of indication information;

Wherein, the liquid crystal display device comprises a liquid crystal display device,

18. The method according to claim 17, characterized in that the method comprises:

the time slot in which the control signaling is located is the last time slot containing the control signaling detected before the terminal equipment sends the uplink physical channel.

19. A method according to any one of claims 17 or 18, wherein the method comprises:

the terminal equipment belongs to a terminal equipment group, and each piece of indication information in the plurality of pieces of indication information corresponds to at least one terminal equipment in the terminal equipment group respectively.

20. The method according to any one of claims 17-18, characterized in that the method comprises:

the control signaling is layer one or layer two signaling;

the terminal device obtains power control information needed by the terminal device to send an uplink physical channel from the plurality of indication information, including:

The layer one or layer two signaling carries power control information for the group of terminal devices,

the layer one or layer two signaling is scrambled by using a wireless network temporary identifier;

the terminal equipment detects the layer one or layer two signaling by using the wireless network temporary identifier, and power control information for the terminal equipment group is obtained;

the terminal equipment obtains power control information required by the terminal equipment for sending an uplink physical channel from the power control information for the terminal equipment group according to the corresponding relation between the content in the obtained power control information for the terminal equipment group and the terminal equipment;

the uplink physical channel is a physical uplink shared channel or a physical uplink control channel.

21. A method of uplink transmit power control, the method comprising:

the wireless access network equipment sends a control signaling to the terminal equipment, wherein the control signaling comprises a plurality of indication information, each indication information comprises power control information required by one terminal equipment for sending an uplink physical channel, so that the terminal equipment obtains the power control information required by the terminal equipment for sending the uplink physical channel from the plurality of indication information;

22. The method according to claim 21, characterized in that the method comprises:

23. A method according to any one of claims 21 or 22, wherein the method comprises:

the terminal equipment belongs to a terminal equipment group, and each of the plurality of indication information corresponds to at least one terminal equipment in the terminal equipment group.

24. The method according to any one of claims 21-22, characterized in that the method comprises:

the control signaling is layer one or layer two signaling;

the step of enabling the terminal device to acquire power control information required by the terminal device to send an uplink physical channel from the plurality of indication information includes:

the layer one or layer two signaling is scrambled by using a wireless network temporary identifier, so that the terminal equipment can use the wireless network temporary identifier to detect the layer one or layer two signaling, obtain power control information for the terminal equipment group, and obtain power control information required by the terminal equipment for sending an uplink physical channel from the power control information for the terminal equipment group according to the corresponding relation between the content in the obtained power control information for the terminal equipment group and the terminal equipment;

25. A method of uplink transmit power control, the method comprising:

the control signaling comprises a plurality of indication information, and at least two of the plurality of indication information respectively comprises power control information required by the terminal equipment for sending an uplink physical channel;

The terminal equipment uses the power control information which is respectively contained in the at least two indication information and is used for the terminal equipment to send the uplink physical channel and sends the uplink physical channel;

26. The method according to claim 25, characterized in that the method comprises:

27. A method according to any one of claims 25 or 26, wherein the method comprises:

the control signaling is layer one or layer two signaling, and the layer one or layer two signaling is scrambled by the wireless network temporary identifier;

the process of the terminal equipment obtaining the power control information required by the terminal equipment for transmitting the uplink physical channel comprises the following steps:

the terminal equipment detects the layer one or layer two signaling according to the wireless network temporary identifier, and power control information required by the terminal equipment for sending an uplink physical channel is obtained;

The terminal equipment obtains power control information corresponding to uplink control information sent by the terminal equipment from a plurality of indication information according to the corresponding relation between the indication information in the layer one or layer two signaling and the terminal equipment;

the indication information is downlink scheduling information, and the uplink physical channel is a physical uplink control channel or a physical uplink shared channel.

28. A method of uplink transmit power control, the method comprising:

the wireless access network device sends a control signaling to the terminal device;

the control signaling comprises a plurality of indication information, at least two indication information in the plurality of indication information respectively comprises power control information required by the terminal equipment for sending an uplink physical channel, so that the terminal equipment uses the power control information required by the terminal equipment for sending the uplink physical channel and respectively contained in the at least two indication information to send the uplink physical channel;

29. The method according to claim 28, characterized in that the method comprises:

30. A method according to any one of claims 28 or 29, wherein the method comprises:

the process for enabling the terminal device to apply the power control information required by the terminal device for sending the uplink physical channel, which is respectively contained in the at least two indication information, includes:

the terminal equipment detects the layer one or layer two signaling according to the wireless network temporary identifier and obtains power control information required by the terminal equipment for transmitting an uplink physical channel, so that the terminal equipment obtains power control information corresponding to the uplink control information transmitted by the terminal equipment from the plurality of indication information according to the correspondence between the plurality of indication information in the layer one or layer two signaling and the terminal equipment;

31. A terminal device, comprising: a processor, a memory and a transceiver, the memory for storing instructions, the transceiver for communicating with a radio access network device, the processor for executing the instructions stored in the memory to cause the terminal device to perform the method of any one of claims 1-8, or to cause the terminal device to perform the method of any one of claims 17-20, or to cause the terminal device to perform the method of any one of claims 25-27.

32. A radio access network device, comprising: a processor, a memory and a transceiver, the memory for storing instructions, the transceiver for communicating with a terminal device, the processor for executing the instructions stored in the memory to cause a radio access network device to perform the method of any of claims 9-16, or to cause a radio access network device to perform the method of any of claims 21-24, or to cause a radio access network device to perform the method of any of claims 28-30.